CVE-2021-47955CWE-79

CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

Medium · published May 16, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
6.3
In the wild
Unconfirmed
What it is

CouchCMS 2.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to execute arbitrary JavaScript by uploading malicious SVG files through the file upload functionality. Attackers can upload SVG files containing embedded script tags to the browse.php endpoint, which are then executed in users' browsers when the files are accessed or previewed.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00172 · 6.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-16T15:26Z
EPSS history
Timeline
  • 16 MAY 15:26Z
    CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload
    cvelistv5